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Cyclic behavior of FRP - crumb rubber concrete - steel double skin tubular columns and beams

  • Li, Danda (University of South Australia, UniSA STEM) ;
  • Hassanli, Reza (University of South Australia, UniSA STEM) ;
  • Su, Yue (University of South Australia, UniSA STEM) ;
  • Zhuge, Yan (University of South Australia, UniSA STEM) ;
  • Ma, Xing (University of South Australia, UniSA STEM)
  • Received : 2020.08.16
  • Accepted : 2021.11.10
  • Published : 2021.12.10
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Abstract

This paper presents experimental and analytical studies to understand the behavior of crumb rubber concrete (CRC)-filled fiber reinforced polymer (FRP) and steel tube double skin column (DSC) and beam (DSB) members under cyclic loading. The main test variable was the percentage of rubber which ranged from 0 to 40%. For column members, different heights corresponding to different aspect ratios were examined to understand the to understand the effect of DSCs' slenderness on the cyclic response of the columns. the. The behavior of the specimens in terms of failure mode, strain development, energy dissipation, load-displacement response were presented and compared. The ability of the current provisions of the Australian codes to predict the capacity of such double skin members was also evaluated based on the test results. This study concluded that the reduction in the concrete strength was more severe at the material level compared to structural level. Also, as the load changed from axial compression in columns to pure moment in beams the negative effect of rubber percentage on the strength became less significant.

Keywords

Acknowledgement

The authors would like to acknowledge the contribution from the UniSA honors students involved in this research project, namely: Yachong Xu, Biyan Dong and Cendi Zhu. The authors would like to acknowledge the donation of the following materials: sand by ResourceCo Pty. Ltd., cement by Adelaide Brighton Cement Pty. Ltd., rubber aggregate by Tyrecycle Pty. Ltd.

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